Depending on what colors are behind the 2 chickens, you can get black and whites, ir you could get black chickens with white , or white chickens with black
those 2 colors are hard because black is dominant color and white hides any other color.

If chicken genetics are anything nearly as confusing as rabbit genetics you could have a white hen , hiding buff, splash, blues etc..
Black could be covering up blues, chocolates, and any dilute color inbetween.
do you know the parents behind you 2 chickens?

You may get any one of thousands of color combinations. Either way, crossing a white to a black will create a cross colored bird that will probably never breed true again. Unfortunately, crossing colors in chickens isn't like mixing paint, there is no sure way to predict the outcome.